A Convex Refracting Surface Has a Radius of 12 Cm

question 61

Multiple Choice

A convex refracting surface has a radius of 12 cm.Light is incident in air (n = 1) and refracted into a medium with an index of refraction of 2.To obtain light with rays parallel to the central axis after refraction a point source should be placed on the axis:

• A)3 cm from the surface
• B)6 cm from the surface
• C)12 cm from the surface
• D)18 cm from the surface
• E)24 cm from the surface

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Definitions:

Equivalent Units

A concept in cost accounting used to allocate costs evenly in processes where incomplete units complicate direct measurement.

Assembly Department

A specialized department within a manufacturing facility where components are assembled into final products.

Equivalent Units

A measure used in the costing of products in process, which converts partially completed goods into an equivalent number of fully completed units.

Weighted-average

A mathematical calculation that takes into account the varying degrees of importance of the numbers in a data set, assigning more weight to some numbers than others.